“A player from the other team used a dummy account to send the message and crashed my entire team,” said reddit user Huntstark. “We all have had to factory reset. Only one of our guys wasn’t affected and he has his messages private.”

According to user BorgDrone, basically, someone can ‘brick’ another’s PS4 just by using “a message designed to exploit a mistake in the code.”

He goes on to explain how this works in technical terms on the reddit thread.

Sony hasn’t issued a warning as of press time, but just to be safe, SET YOUR MESSAGES TO PRIVATE on your PS4 for now.

Here is how to set messages to private in case you don’t know how, courtesy of Gunrun: